After taking a well-deserved break to chow down on a bowl of spaghetti, she gets back to work and is helped into an all-in-one which boasts some seriously impressive prosthetics - we're talking intestines spilling from her stomach and bolts jolting from her legs.
As the process unfolds, Klum shared updates on Instagram with her latest images showing the A-lister smiling to the camera with a face decked in deep veins, muscles and bones.
We have yet to be given a full look at the costume but followers have been chucking guesses into the Instagram sphere with speculation rife that she's taking on the role of Frankenstein or a zombie this year.
Last All Hallow's Eve, the German model opted for a clever couple's costume with husband Thomas Kaulitz whom she wed in February 2019.
Putting our cat ears to shame, the pair dressed as Princess Fiona and Shrek but the whole Klum Halloween extravaganza took some getting used to for newbie Kaulitz.
So much so, that Klum has vowed not to put as much pressure on him this time around.
"His is gonna be easier [than mine this year] because last year I felt so bad for him," she told People. "He had never done this before and it was harder for him than for me because he had the big belly and the face. I'm used to it but he was like, 'Oh my god, I'm gonna die! It’s so hot!'"
"He's just as nuts as me, but I had to come up with something a little easier for him to wear this time around."
In years gone by, Klum has provided Halloween costume inspiration for enthusiasts across the globe by going undercover as everything from Jessica Rabbit back in 2015 to an elderly woman two years previously.
But only time will tell if this year's effort tops a long list of headline-stealing ensembles - stay tuned.